<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>登录界面</title>
</head>

<body>

  <form action="login" method="post">
    <label>用户名</label>
    <input type="text" name="username" placeholder="输入用户名" />
    <label>密码</label>
    <input type="text" name="password" placeholder="输入密码" />
    <input type="submit" value="登录" />
  </form>

</body>

</html>